com.deepoove.poi.resolver.RunningRunParagraph Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of poi-tl Show documentation
rending docx template
The newest version!
/*
 * Copyright 2014-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.deepoove.poi.resolver;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.deepoove.poi.util.StyleUtils;

public class RunningRunParagraph {
	
	private static final Logger LOGGER = LoggerFactory.getLogger(RunningRunParagraph.class);
	
	private XWPFParagraph paragraph;
	private List runs;
	
	List> pairs = new ArrayList>();
	
	public RunningRunParagraph(XWPFParagraph paragraph, Pattern pattern) {
		this.paragraph = paragraph;
		this.runs = paragraph.getRuns();
		if (null == runs || runs.isEmpty()) return;
		
		buildRunEdge(pattern);
	}
	
	public List refactorRun(){
		if (pairs.isEmpty()) return null;
		List templateRuns = new ArrayList();
		int size = pairs.size();
		Pair runEdgePair;
		for (int n = size - 1; n >= 0; n--) {
			runEdgePair = pairs.get(n);
			RunEdge startEdge = runEdgePair.getLeft();
			RunEdge endEdge = runEdgePair.getRight();
			int startRunPos = startEdge.getRunPos();
			int endRunPos = endEdge.getRunPos();
			int startOffset = startEdge.getRunEdge();
			int endOffset = endEdge.getRunEdge();

			String startText = runs.get(startRunPos).getText(0);
			String endText = runs.get(endRunPos).getText(0);
			if (endOffset + 1 >= endText.length()) {
				// end run 无需split，若不是start run，直接remove
				if (startRunPos != endRunPos)
					paragraph.removeRun(endRunPos);
			} else {
				// split end run, set extra in a run
				String extra = endText.substring(endOffset + 1, endText.length());
				if (startRunPos == endRunPos) {
					XWPFRun extraRun = paragraph.insertNewRun(endRunPos + 1);
					StyleUtils.styleRun(extraRun, runs.get(endRunPos));
					extraRun.setText(extra, 0);
				} else {
					XWPFRun extraRun = runs.get(endRunPos);
					extraRun.setText(extra, 0);
				}
			}

			// remove extra run
			for (int m = endRunPos - 1; m > startRunPos; m--) {
				paragraph.removeRun(m);
			}

			if (startOffset <= 0) {
				// start run 无需split
				XWPFRun templateRun = runs.get(startRunPos);
				templateRun.setText(startEdge.getTag(), 0);
				templateRuns.add(runs.get(startRunPos));
			} else {
				// split start run, set extra in a run
				String extra = startText.substring(0, startOffset);
				XWPFRun extraRun = runs.get(startRunPos);
				extraRun.setText(extra, 0);

				XWPFRun templateRun = paragraph.insertNewRun(startRunPos + 1);
				StyleUtils.styleRun(templateRun, extraRun);
				templateRun.setText(startEdge.getTag(), 0);
				templateRuns.add(runs.get(startRunPos + 1));
			}

		}
		return templateRuns;
	}
	
	private void buildRunEdge(Pattern pattern) {
        Matcher matcher = pattern.matcher(paragraph.getText());
        while (matcher.find()) {
            pairs.add(ImmutablePair.of(new RunEdge(matcher.start(), matcher.group()),
                    new RunEdge(matcher.end(), matcher.group())));
        }
		if (pairs.isEmpty()) return;
		
		int size = runs.size();
		int cursor = 0;// 游标

		int pos = 0;
		// 计算第0个模板
		Pair pair = pairs.get(pos);
		RunEdge startEdge = pair.getLeft();
		RunEdge endEdge = pair.getRight();
		int start = startEdge.getAllEdge();
		int end = endEdge.getAllEdge();
		for (int i = 0; i < size; i++) {
			XWPFRun run = runs.get(i);
			String text = run.getText(0);
			// 游标略过empty run
			if (null == text) {
				LOGGER.warn("found the empty text run,may be produce bug:" + run);
				cursor += run.toString().length();
				continue;
			}
			LOGGER.debug(text);
			// 起始位置不足，游标指向下一run
			if (text.length() + cursor < start) {
				cursor += text.length();
				// if (null != run.getCTR().getBrArray()){
				// cursor += run.getCTR().getBrArray().length;
				// }
				continue;
			}
			// 索引text
			for (int offset = 0; offset < text.length(); offset++) {
				if (cursor + offset == start) {
					startEdge.setRunPos(i);
					startEdge.setRunEdge(offset);
					startEdge.setText(text);
				}
				if (cursor + offset == end - 1) {
					endEdge.setRunPos(i);
					endEdge.setRunEdge(offset);
					endEdge.setText(text);

					if (pos == pairs.size() - 1)
						break;

					// 计算下一个模板
					pair = pairs.get(++pos);
					startEdge = pair.getLeft();
					endEdge = pair.getRight();
					start = startEdge.getAllEdge();
					end = endEdge.getAllEdge();
				}
			}
			// 游标指向下一run
			cursor += text.length();
		}
		
		for (Pair runEdges : pairs) {
            LOGGER.debug("[LEFT]:" + runEdges.getLeft().toString());
            LOGGER.debug("[RIGHT]:" + runEdges.getRight().toString());
        }
	}

}